Knutsen, Tor; Strand, Espen; Klevjer, Thor Aleksander; Thorsen Broms, Cecilie; Melle, Webjørn (2024): Macroplankton and micronekton trawl data from the Norwegian Sea 2019-2020 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964527
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Abstract:
We provide here a curated set of data containing standardized catch biomasses and abundances of key macroplankton and mesopelagic fish taxonomically identified to species or genera or the nearest possible taxonomic group collected by a Macroplankton trawl (~6 m x 6 m mouth opening, non-graded mesh with 3 mm light-opening) from cruises in the Norwegian Sea during the International Ecosystem Survey in the Nordic Seas (IESNS) in May to June 2019 and 2020. The collected material is obtained from standardized V-shaped hauls down to a maximum depth of about 1000 m, although some shallower V-hauls are included either to look at the vertically migrating mesopelagic organisms that enter the epipelagic domain during nighttime hours, or because of depth restrictions due to shallow bottom topography. This dataset holds the biomass and abundance data of species or taxonomically identified categories. Filtered water volume (m³) was determined by calculating the towed horizontal distance (m) from when the trawl was deployed until maximum depth (m) and similarly when retrieved. Then, knowing the maximum depth of the trawl, by trigonometric calculations the trawl path (hypothenuse) during downcast and upcast were derived. The filtered volume was calculated by multiplying the summed towpath distance (m) by the nominal trawl opening of 36 m².
Project(s):
Funding:
Institute of Marine Research, Bergen (IMR), grant/award no. 14931: Monitoring the environment and plankton in the Norwegian Sea
Coverage:
Median Latitude: 68.034124 * Median Longitude: 4.909612 * South-bound Latitude: 62.291563 * West-bound Longitude: -11.371874 * North-bound Latitude: 72.871110 * East-bound Longitude: 19.898538
Date/Time Start: 2019-05-03T19:50:00 * Date/Time End: 2020-05-26T16:26:00
Minimum DEPTH, water: 100.0 m * Maximum DEPTH, water: 1121.5 m
Event(s):
58GS2019107_146-MPT (146) * Latitude Start: 63.937515 * Longitude Start: 5.743030 * Latitude End: 63.879338 * Longitude End: 5.696303 * Date/Time Start: 2019-05-03T19:50:00 * Date/Time End: 2019-05-03T21:08:00 * Campaign: 58GS2019107 * Basis: G. O. Sars (2003) * Method/Device: Macroplankton trawl (MPT)
58GS2019107_154-MPT (154) * Latitude Start: 64.167351 * Longitude Start: -8.755289 * Latitude End: 64.114091 * Longitude End: -8.611509 * Date/Time Start: 2019-05-06T22:35:00 * Date/Time End: 2019-05-07T00:30:00 * Campaign: 58GS2019107 * Basis: G. O. Sars (2003) * Method/Device: Macroplankton trawl (MPT)
58GS2019107_158-MPT (158) * Latitude Start: 66.621439 * Longitude Start: -11.371874 * Latitude End: 66.584226 * Longitude End: -11.206192 * Date/Time Start: 2019-05-09T06:17:00 * Date/Time End: 2019-05-09T08:14:00 * Campaign: 58GS2019107 * Basis: G. O. Sars (2003) * Method/Device: Macroplankton trawl (MPT)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Knutsen, Tor | |||
| 2 | Optional event label | Event 2 | Knutsen, Tor | |||
| 3 | Date/Time of event | Date/Time | Knutsen, Tor | |||
| 4 | Date/Time of event 2 | Date/Time 2 | Knutsen, Tor | |||
| 5 | Latitude of event | Latitude | Knutsen, Tor | |||
| 6 | Longitude of event | Longitude | Knutsen, Tor | |||
| 7 | Latitude of event 2 | Latitude 2 | Knutsen, Tor | |||
| 8 | Longitude of event 2 | Longitude 2 | Knutsen, Tor | |||
| 9 | Serial number | Ser No | Knutsen, Tor | |||
| 10 | Depth, water, top/minimum | Depth water top | m | Knutsen, Tor | ||
| 11 | Depth, water, bottom/maximum | Depth water bot | m | Knutsen, Tor | ||
| 12 | DEPTH, water | Depth water | m | Knutsen, Tor | Mean values | Geocode |
| 13 | Type | Type | Knutsen, Tor | haul | ||
| 14 | Total catch | Catch tot | kg | Knutsen, Tor | Weighted | |
| 15 | Discard catch | Catch disc | kg | Knutsen, Tor | Weighted | |
| 16 | Subsample, wet mass | Subsamp wet m | g | Knutsen, Tor | Weighted | |
| 17 | Taxon/taxa | Taxa | Knutsen, Tor | Visual identification (VID) | ||
| 18 | Taxon/taxa, unique identification | Taxa UID | Knutsen, Tor | Visual identification (VID) | WoRMS | |
| 19 | Taxon/taxa, unique identification (Semantic URI) | Taxa UID (Semantic URI) | Knutsen, Tor | Visual identification (VID) | WoRMS | |
| 20 | Taxon/taxa, unique identification (URI) | Taxa UID (URI) | Knutsen, Tor | Visual identification (VID) | WoRMS | |
| 21 | Taxon/taxa, unique identification | Taxa UID | Knutsen, Tor | Visual identification (VID) | ITIS | |
| 22 | Taxon/taxa, unique identification (Semantic URI) | Taxa UID (Semantic URI) | Knutsen, Tor | Visual identification (VID) | ITIS | |
| 23 | Taxon/taxa, unique identification (URI) | Taxa UID (URI) | Knutsen, Tor | Visual identification (VID) | ITIS | |
| 24 | Index | Index | Knutsen, Tor | 1 = whole catch sorted, 0 = subsample sorted | ||
| 25 | Number of individuals | Ind No | # | Knutsen, Tor | Counted whole | sorted |
| 26 | Mass | Mass | g | Knutsen, Tor | Weighted | sorted |
| 27 | Number of individuals | Ind No | # | Knutsen, Tor | Counted whole | length measured |
| 28 | Mass | Mass | g | Knutsen, Tor | Weighted | length measured |
| 29 | Number of individuals | Ind No | # | Knutsen, Tor | Counted whole | total in net |
| 30 | Mass | Mass | g | Knutsen, Tor | Weighted | total in net |
| 31 | Water volume, filtered | Vol filtered | m3 | Knutsen, Tor | Calculated | |
| 32 | Abundance per volume | Abund v | #/m3 | Knutsen, Tor | Calculated | |
| 33 | Biomass, wet mass per volume | Biom wm | g/m3 | Knutsen, Tor | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 4 (ProcLevel4)
Size:
2854 data points
Download Data
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